I also get the same problem while uploading my build to the app store via Xcode 8. After uploading successfully from Xcode, I login to iTunes connect and see that it shows as Processing. After a little while it disappears. I've tried multiple times but have never been able to make it visible.
I emailed Apple Support and they only say that my build contains an error and they ask me to check my build settings again. But, If there is any error there, shouldn't it at least be showing something for me to know?
How have others resolved this issue?